Improvement in steam-engine valve-gear



-MM-WSWM JOSEPH CRAMPTO'N ,'o-F NEW YORK, N. Y.

Leners Patent No. 84,615, dated December 1, 186e.

DMPROVELEENT IN STEAM-ENGINE VALVE-GEAR The Schedule referred to these Lett'ers Patent and Imaking part of the same.

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To all lwhom it may concern Be it known that I, JOSEPH ORAMPTON, of the city, county, and State of New York, have invented a new and useful Improvement in Reversing-Gear for Oscillating Engines, of which the following is a full, clear, and exact description, reference being had to the accompanyin g drawing, forming part of this specication, and in Which- Figures 1 and 2 represent longitudinal views or elevations of anl oscillating engine in part, with my improved reversiug-gear applied thereto, and in opposite positions, to reverse the action of the engine.

` Similar letters of reference indicate corresponding I y parts in both figures.

This improvement in reversing-gear for oscillating engines consists in attaching the valve-gear to a re- Versing-arm or lever, arranged, in swinging it, to cross to opposite sides of the cylinder-trunnions, whereby, accordingly as said lever is thrown to the one side or other, the valve`- is shifted, to reverse the action of the engine, said imprbvement thus forming a most simple and etticient reversing-geai-a'nd the reversing-lever made to constitute the Afixed pointer tie to the valveg'eai-to secure the operation of the valve by the oscil-v lation of the engine-cylinder.

Referring to the accompanying drawing-l A is the engine-cylinder, arranged to oscillate on trunnions or a centre, a.

B is the piston-rod, and

C, the crank operated by it.4

D represents the engine-valve, carried hy or on the cylinder A, and which may be of any suitable kind to control steam and exhaust-ports or passages, b b and c, the same here heilig shown as a slide-valve of 12v-form, arranged to reciprocate in direction of the length ofthe cylinder. a

This valve is connected, by its rod or stem, d, to a double-arm lever or beam, E, having its fulcrum, as at e, carried by the cylinder.

F is a link or rod, lpivoted, at its one end to the beam E, and at its other end/to a reversing-lever, 2G, which is shown as working on a ixed flcrum; j, and as being at liberty to play'between ,stops g g, the fulcrum 'j' to said lever being in the same linel or plane as the cylinder-trunnons and clank-shaft, or otherwise being'sov arranged as that said lever may be swung to cross a line running parallel with the axial line of the cylinder, or, in other words, be thrown to opposite sides of the cylinder-trunnions, as represented in the drawing.

From this description, it will be seen that while the lever- Gforms, by the attachment of' the rod F to it, a tie or point of rest for the'operation of the valve by the oscillation of the engine-cylinder to keep up the reciprocating action of the piston, said lever, by being thrown to opposite sides, as it were, of the cylindertrunnions, so shifts -the valve as to secure a reversed action' of the engine, as clearl represented in Jrigs. l and 2, where the changed mo ions of the crank, consequent on such shifting ofthe valve, are indicated by arrows a: x. v

This forms a very simple and eiiicient reversing-gear, and, by adjusting the lever G midway so adjustsY the valve as to stop the engine.

What is here claimed, and desired to be secured by Letters Patent, isl Y The combination of the' reversing-lever G, link F, and valve-operating beam E, the whole arranged reln and valve, substantially as and for the purpose herein specified.

y JOSEPH CRAMPTON Witnesses:

A. Ln CLERC, A.

of the stops g g,

atively to each other, and to the cylinder-trunnion,A 

